Do the following sentences say the same thing?

Her birthday, 21 April, was declared a public holiday and she attended a reception and a ball.
When his grandmother, then-Princess Elizabeth, turned 21 in 1947, the day was declared a public holiday, and she attended a reception and a ball.

Return your answer on a scale from 0 to 5, where 0 is "not similar" and 5 is "very similar".
3